Air-superheating device for furnaces.



` w. E. SHORE.

AIR SUPERHEATING DEVICE'FOR FRNACES.

APPLICATLON FILED JUNE l?. 19H.

- lmwnmiv oet. 26, 1915.

3 SHEETS-SHEET l i rf/7 MR SUPERHEATING APPLKICATlON FIL'ED JUNE l1. 1,914.

SHURE.A y DEVICE FQR- FURNACES.

IHN lll Patented oef. '26,. 1915.

WILLIAM "a,,stron-a, or NEW Youn, N. Y., assIG'NoP. 'ro coMBUs'ro Devices conoaarxoN, or -NEW Yoan, N. Y., A CORPORATION or NEW Yoan.

I Application filed J une 17 To all 'whom it may concern.

- Beit known that :[WilLLIAM E. SHORE, a subject of the King of Great ritain, residing lat New York, in the it inty'of New '5 York and State of New York, have invented certain new and useful Improvements 1n Air-Superheating Devices for Furnaces, of which the following is a specification.

This invention relates to improvements in air superheating devices for use in super,-

. ing the manner of heating lair in furnaces, and the like, to aid combustion.

While it is intended to superheat the air passing through the superheaterA by radiation of the heat from the metallic casing, the heat being supplied by the fuel intthe furnace, the principal object of the invention is to combine with the superheater, an auxiliary heating means for use temporarily,

'Y that is to say, to heat the. air 'in the heater when the fire is being started, in order to facilitate and quicken the iire in the furnace, which,thereafter, heatsl the superheater to a high degree of heat, causing it to highly superheatV the air as it passes therethrough.

A further object of the invention is to so construct the superheater that the a/ir will be passed back and forth therein o er very considerable area, or surfaces of hdi metal,

so as to heat the air to an excee ingly high temperature, before it is introduced into and the gases or'products of com-I i-niXed with bustion in thefurnace.

In the drawings, Figure 1 is atop'plan view of` theheater, showing in section, a fragment of the furnace wall andvfi-re-door,- to which the superheater is attached, showsupplying gasv to the heater for preliminary heating. Fig. 2 `is a front elevation of the same, part of the fire-door being broken away, to show the air inlets of the heater, and the damper for controlling them; Fig. 3V is a vertical section taken about `on line a-a of Fig. 2; Fig. 4 is anotherverticalsection taken about on line b-b of'Fig.' 2. Fig. 5 is a frontrview of-.the heater with the doorvand front plate partly broken away, there vheilig shown in one of the compartments of the heater, an electric heating coilv instead of the gas appliance, according to Figs. 1 and 2; Fig. 6 is a central sectional view about on' line c-,c of Fig. 5, he distributer being omitted.

Referring to the drawings, the numeral 1 designates 'the -superheater casing, substan- Specication of Letters Patent.

vg'ether with the bottom 5 of the casing,

front edges of the partitions together with passages v38, 39, 40 `and 41,

AIBfsUrEBHEA'rING DEVICE Fon FURNACES. j

Patented Oct. 26, 1915. ,1914. seal 110.845,624.

The front wall :a is "removable and fits in' snugly between the front flanges 8 of the casing, wherein it mayV be secured by any, suitable means. This wall 2 stops short of the bottom of the casing, thus providing between the bottom of the wall and the botv tom of the casing air yinlets 9 leading from a'preheating chamber 10 formed between thefront wallf2 and the furnace fire-door 11. Thedoor is provided with suitable vents 12 through which air enters the chamber preparatoryto being conducted. through the heater, to which fire-door theheater is rigidly secured by means of bolts 13 passing through the lire-door, and into lugs 14 provided integral with theI side walls of the casing, as better sh wn in Fig. 5.

The numerals 15,46, 17 and 18 designate a series of transverse partitions which, d

an the 'vertical partitions 19, form a series of conduits'or passages 20' which are in communication with each other throughpassages 21, 2v2, and 23, thepassages being formed alternately-'between the rear and 15, 16, 17 and 18, and the uppermost conduit communicates with an outlet conduit 24 formed between the partitions 18, andthe lower partition 25 of .the upper through a passage 26 formed betweenfthe rear side of the wall 2 and the frontend ings extending entirely lacross the outlet end of the casing, as in dotted lines,

Figs; 1 and 3. y

The numeral 28de'sig'nates another series of inlet openings' through the wall 2 of the;

heater. The lower series of openings .com-

vInunicates with conduitsy or .passages` 2,9

series of partitions,

the rear wall 3, 'as indicated at 27,

formed between the partition 25 and-.the

transverse partition 30, like the lower par titions, extending from side tofside of the heater. AAbove the partition 30 arc'other transverse-partitions 31, 32, and 33, which,

form a series of conduits 34, 35, 36 and which arein communication alternately', at the rear vand front of the casing', through the 4uppernrmyst the top iioor, of the casing',`

passage leading to the outlet opening 4Q,

at the rear top ot the casing, thus t'ornnng a series `of outlet openings corresponding' to the lower outlet openings 2T.

The numeral 43. designates what I call the distributer end of the casing, which cour prises a casting having closed sides and top, the top bein curved so as to slightly overlap the top oor otl the casing, to which the distributer is rigidly attached, by means ot` bolts 44, or other suitable means. lhe .tront of the distributer is provided with a series of apertures or outlet openings 45, which communicate with spaces 46 between a series of vertical ribs 47 and 48, the ribs 4i' being generally narrower than the ribs 4S, so as to leave a space 49 between said ribs and the rear face of the asing, against which the distributer tits. The ribs 4S. which pret'- erably alternate with the ribs 46. are cut away, as indicated at 49 and 5t), the cut away portions 49 coming opposite the outlet openings 42, and the cut away portions 5t) coming opposite the outlet openings '27. thus providing for lateral circulation through the distributer, between the ribs. The bottom ol the distributer is provided with a series ot downwardly opening outlet openings 5l, communicating with the spaces betweenfthe various ribs, so that when the superheated air, after having been passed alternately back and forth. through the. casing between the various partitions and through the various conduits, will be discharged through the openings 27 and 42 into the distribnter. where it will come in contact with the hot surfaces of the distributer, and be t'urther superheated and ultimately discharged through the outlet openings 45 and 5l. where it mixes with the products ot combustion in the. furnace. The sulwrheated air. passing through the underneath openings 51 ofthe distributor, forms a cloak or envelop around .the lower edge. ot the distributer, thus insulating it, to some extent. trom the very intense heat ofthe furnace. which prevents the metal of the distributer t'rom burning away at its lower edge.

As thel air enters the inlets 9 and QS, atter having been heated to a` considerable extent in the. preheating chamber 1() formed between the inner t'ace ot -the tire-door and the. trout wall of the heater, it comes in contact. in passing through the. casing, with the. highly heated surl'aces forming the vertical and horizontal partitions. and by so doing. becomes t'urther heated and expanding.. passes through the various conduits or passages, until it is discharged in a highly heated state. into the distributer. where it is further superheated and ultimately discharged into the l'urnace. 'lhc heater casing extends well out into the t'urnact` over the tire. in a position wherein it is intensely heated, heated lo suelen degree. in tact, that "hashing" point ot common gases` so that obviously, it will quickly mingle with the products ol combustion. and consume thev t'ree carbon in such products. and convert them into a combustible gas. which is readily consumed. thusI eliminating smoke, and aiding in combustion.

'lhe numeral fr. designates two gas nozzles. which arc provided on their under side with lighting apertures 52E. 'l`hese nozzles are supported in bosses .it in the trout wall 2. and extend lor somel distance into the casing. 'l`heir outer ends are connected by a branch pipe 55 which receives centrally. a vertical pipe fili. the upper end ol which is connected b.' al1 angle connection 5T. with a pipe 5S. whose outer end is received in `the sleeve 5t) ot' a swivel valve (i0. communicating with the main gas pipe or connection til. This swivel valvt` is centered with the hinges (i2 ot' the lire-door ll. so that the door may be opened and closed without interfering in any way` with the gas connection. These burners are arranged in horizontal line with each other. and in two ot' the conduits in the 'lower series ot' transverse and vertical partitions. and serve to heat the air passing through their innnediate conduits, and the adjacent conduits on either side. of thc burner. These burners are lighted when the lire is being started and when it `is desired to Vfacilitate combustion and quicken the tire, and after the tire has become sulliciently hot, so that it can be depended upon to bring the heater casing to a very high degree of heat, the gas supply may be cut ott'.

In the t'orm ot heater shown in Figs. 5 and 6, the auxiliary heater is placed in a comlmrtment immediately above the inlet openings :'28, the horizontal partition 31 being in this form, omitted, as well as the vertical partitions between the partitions 30 and 32. The numeral 63 designates an electric heating coil which maybe of any approved eonstruction, and it is supported upon a series of rods 63 mounted preferably in mica-insnlation blocks 64 and 65, located respectively in the front and rear walls 2 and 3. there. being a. suitable electrical connection Gti tor supplying current to the heating coil.

'lhe numeral (3T designates` a damper which ynormally covers all ol` the condtllts, except the inlet openings 9 and QS, and is yrovided. in its upper portion` with a series oi horizontally arranged openings (SS, adapted to control the inlet openings 28, upon the vertical movennfnt. ol' the damper. 'lhe lower end of the. damper normally ends at the top of the inlet openings 9 and the vcrtical movement of the dampenlis such .that it will simultaneously controlv the air supply to both the openings 9 and 28. The vertical movement of the damper is brought about by a cam 69 which is carried upon a short shaft 7 O suitably journaled in the Wall?J and extending through the tire-door 11, outside of which it is provided with a hand Wheel 71. The cam 69 ivorks in a cam slot 72 in the damper, so that obviously, when the hand-wheel is turned, the cam will lift or lower the damper and thereby enlarge Vor diminish the inlet openings 9 and 28, as the exigencies of the case may require.

The top of the casing is provided with openings for the passage of the gas from the burners 52.

It will be noted that the chambers or spaces formed by the various horizontal partitions, increase in cross sectional area, `thus giving the air, which has been, to some extent, preheated, space ,in which to expand as it passes from chamber to chamber, becoming in the meantime, more expanded. This additional room for expansion, as the air becomes hotter, permits the air to pass through the superheater With even velocity thus preventing any retarding of the air, by reason of its increased volume. However, it will be seen that the provision of the various conduits formed by the vertical partitions extending to a greater or less extent into the casing, resists or retards the too free movement of the air through the casing, byl reason of the skin friction of the air against the metal, which, it will be understood, is very highly heated from the heat of the furnace, so that, as the air comes `into the inlet opening and is passed to and fro through the casing contacting with various metal surfaces, it becomes extremely hot, so that by the time it is discharged through the .outlet openings 2T and 42, it is extremely hot and after contacting with the hot surfaces of the distributer 43, it is further superheated, and discharged into. and intermingles with the gases or products of com# bustion from the fuel, thus producing additional heat in the furnace, by reason of consuming the'frec carbon or unconsumcd fuel in the furnace. The advantageous results of this are obvious, as there is practically no smoke, an indication that the fuel usually wasted, is consumed. 4

llaving thus described my invention,what I claim iszl. A superheater comprising a casing adapted for attachment to a furnace and to extend into the fire-pot thereof,'provided with a plurality of intercommuntiating chambers, there being an inlet opcning couimunicating with said chambers, and an outlet opening leading from said' chambers, through which thc"superheated air is discharged into the combustion chamber, and

an a heat so the superheater, heat supplied by the products of combustion in the furnace, for the purposes set forth. p 2. A superheater adapted for attachment to a furnact and to extend into lthefire-pot thereof, provided with a plurality of intercommunicating chambers, there, being an inlet opening communicating with said chambers, and an outlet openingi leading from Vsaid chambers, through Which the superheated air is discharged into the combustion chamber, and a gas burner in said casing, and adapted to supply heat to heat the air in' said chambers, as and for the purposes set forth. 2. In combination with the fire door of a furnace, a super-heater comprising a casing having horizontal partitions therein with passages therethrough dividing it into intercommunicating chambers, there being suitable inlet and outlet openings, an auxiliary heater extending into said casing, to supply heat independently of the heat from the products of combustion of the furnace.

4. The combination with the fire door of a furnace, a super-heater comprising a casing secured to said door, and provided with a plurality of horizontal partitions provided Witlt openings, whereby the spaces between said partitions are placed in intercommunication, and a series of vertical partitions between the horizontal partitions, forming conduits for the passage of the air Which is heated by radiation from Said horizontal and vertical partitions, there being suitable inlet and outlet openings through which the air. to be superheated is admitted to the casing and Ydischarged therefrom respectively, and an auxiliary supply heat independent of the heat from the products of combustion of the furnace.

5. In combination with the fire door of-a furnace, a super-heater comprising a casing adapted to be secured to said door, and provided with a plurality of intercommunicating chambers, there being an air inlet for 'admitting the air to said chambers, and an outlet opening for discharging' the air therethrough, and a distributer casing secured to the rear end of the superheater casing, said. distributer casing being provided with apertures for the discharge of the superheated air which has passed through the main body of the casing, in which distributer casing the air becomes further superheated before being discharged, and intermingles With the products of combustion of the furnace, and an auxiliary heater vwithin the casing adapted to supply heat independent of that supplied by the fuel in the furnace.IV

6. In combination with furnace, a superheater comprising a casing adapted to be attached to said door, said xiliary heating means for supplying independent of thethe ire door of a` heater adapted to casing being provided with a plurality of lntercommunicatmg chambers, there being an inlet and outlet opening communicating with said chambers, a gas burner extending into the casing and adapted to supply heat lndependent of the heat supplied by the products of combustion in the furnace, said burner being suppl nection mounted co ied with gas by a conncentric with the hinge 

